Project UnbreakableDebra Rich & Carmen Prieto • ME 104Q • Fall 2004

The purpose of this project was to design a bridge using Aluminum Alloy as the metal. The goal is for the bridge to have the greatest ratio for weight it holds to actual weight of the bridge. The bridge should be able to hold approximately 500 pounds without any damage to the body.

To design the bridge we used the program ANSYS Workbench. This program allowed us to build the bridge and apply a force in order to determine the amount of weight that it could potentially hold without experiencing any damage. After designing and performing the simulation in ANSYS Workbench, the application Microsoft PowerPoint was used to draw the blueprints for the bridge in order for it to be built.

After performing the simulation process using ANSYS Workbench our bridge should be able to hold approximating 500 pounds with any damage. In fact, it should be able to hold 7,000 pounds before damage occurs to the body. As a result, our bridge has a safety factor of 15. Our bridge also has a Maximum Equivalent Stress of 3.539e7 and a Maximum Shear Stress of 2.035e7. The bridge also has a Total Deformation of .132e-3.

In designing the bridge we also had to put into consideration the fact that a 3” by 5” index card needs to fit under the center of the bridge. All pieces touching the table also need to be able to fit in the area of a 3” by 5” index card as well. We designed our bridge to meet this factors and to be a strong and sturdy bridge. We also wanted it to be aesthetically pleasing to the eye, so we used arcs to support the bridge.

To conclude, our bridge should be able to support approximately 500 pounds without any damage done to it. However, because aesthetics were a large factor in the designing of the bridge, it will probably not have the greatest ratio of weight that it holds to weight of the bridge.

Abstract

Methods

Results

Discussion

Conclusion

Revision with ReasonNo. Date Initials

Drawing No.

ME104Q-ProjectDescriptive Part Name

Designed by Checked by Engineer

Drawing Type

Bridge Deck

Date of This RevisionDrawing Issue Date

Drawing Size Scale as Drawn Scale as Printed

Engineer Phone #

Quantity Required

1Detail A 8 x10 1:1, 1indrawing=1inpart

D. Rich & C. Prieto D. Quesnel

275-521512/08/04 12/08/04

1:1 =100%

NOTES:

Material 6061-T651 sheet Aluminum

Shear to Size

Break Sharp edges

Drill Holes when flat (4 places) relativeto exterior corners and the middle.

Fold 90 degrees in two places alongdotted fold lines to form part as shownin Drawing #A-004. Both Bent Legs shouldbe same length.

After bend the gap span should be 1 inch exactly.

All dimensions in inch units.

Unless otherwise indicated,use default tolerances belowx.x +/- 0.050”x.xx +/- 0.010”x.xxx +/- 0.005”Angles +/- 2o

3.25

1.1251.125

11.50

0.50

0.063

5.50

1.125

.50

Revision with ReasonNo. Date Initials

Drawing No.ME104Q-ProjectDescriptive Part Name

Designed by Checked by Engineer

Drawing Type

Bridge leg

Date of This RevisionDrawing Issue Date

Drawing Size Scale as Drawn Scale as Printed

Engineer Phone #

Quantity Required

2detail A 8 x10 1:1, 1indrawing=1inpart

Carm and Debb D. Quesnel

Xxx-yyyy12/08/04 12/08/04

1:1 =100%

1.5 in.

1.5 in.

1.5 in.

9.5 in.

1 in.

1 in.

1.5 in.

1 in.

1 in.

1 in.

1.5 in.

1.5 in.

1 in.

3.5 in.

3.5 in.

3.5 in.

2.5 2.5

3 in.

11.5 in.

5 in.

Front view

5 in.

1/16 in

Profile view

NOTES:

Material 6061-T651 sheet Aluminum Aloy

Shear to Size

Break Sharp edges

Drill Holes when flat (6 places) relativeto exterior corners.

Fold 90 degrees upwards as if the sheet where laid on the table in the two places alongdotted fold lines to form part as shownin Drawing #A-004. Both Bent Legs shouldbe same length.

The proceeding page shows holesfor rivets to got through.

All dimensions in inch units.

Unless otherwise indicated,use default tolerances belowx.x +/- 0.050”x.xx +/- 0.010”x.xxx +/- 0.005”Angles +/- 2o

Fold on these two dotted lines

Revision with ReasonNo. Date Initials

Drawing No.

ME104Q-ProjectDescriptive Part Name

Designed by Checked by Engineer

Drawing Type

Bridge assembly

Date of This RevisionDrawing Issue Date

Drawing Size Scale as Drawn Scale as Printed

Engineer Phone #

Quantity Required

1detail A 8 x10 1:1, 1indrawing=1inpart

Carm and Debb D. Quesnel

Xxx-yyyy

12/08/04

12/08/04

1:1 =100%

NOTES:

Material 6061-T651 sheet Aluminum Aloy

Shear to Size

Break Sharp edges

Drill Holes when flat (12 places) relativeto exterior corners.

Circles represent rivets to be placed.

Place A-002 exactly 3.25 from the ends of the bridge deck and

Rivets that appear on the presentable surface ofthis bridge should be reflected onto the other bridge leg.

All dimensions in inch units.

Unless otherwise indicated,use default tolerances belowx.x +/- 0.050”x.xx +/- 0.010”x.xxx +/- 0.005”Angles +/- 2o

1 in.

1.1251

.875

1.0625.875

.75

Quantity Supplier

Bill of Materials1

2

Item

1

2

4 12

Bridge Deck

Bridge deck Support

Aluminum Pop Rivets 1/8” Any supplier

A-002

3 2

Bridge Leg

A-003

A-001